[Ips-dhfpr] IPS Daily HF Prop Report - 17 October 13 issued 2330 UT on 17 Oct 2013

[Regional Warning Centre]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/17 OCTOBER 2013 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (17 OCTOBER) 
Date   T index  Conditions    
17 Oct    92    Normal         

Flares    Max     Fadeout    Freq.  Sectors
 M1/--    1541UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
      Enhanced by 20% after local dawn.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 20% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Sep      68
Oct      72
Nov      70


2. FORECAST (18 OCTOBER - 20 OCTOBER)
Date   T index  Conditions       MUFs                              
18 Oct    80    Normal           Near predicted monthly values
19 Oct    80    Normal           Near predicted monthly values    
20 Oct    75    Normal           Near predicted monthly values   

COMMENT: IPS SWF HF Communications Warning 28 was issued on 17 
October and is current for 18 Oct only. Max Usable Frequencies 
were near predicted monthly values over most of the Australasian 
region with night-time enhancements across mid and low latitudes 
from either remnant geomagnetic activity of the previous day 
or thermospheric winds transporting ionisation into the region. 
Expected to continue at or above median MUFs for next 1-2 days 
due to relatively strong ionising EUV flux (f10.7cm) from numerous 
sunspot regions on the disc. The most prolific x-ray region AR1861 
rotates off the disc 18-19th so ionising flux may decrease slightly 
from the 20th.

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For an explanation of some of the terms in this report, go to
http://www.ips.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.

IPS Radio and Space Services        email: asfc at ips.gov.au
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